21781148

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 42184800

約数和(自身を除く): 20403652

約数列:

[1, 2, 4, 17, 34, 59, 61, 68, 89, 118, 122, 178, 236, 244, 356, 1003, 1037, 1513, 2006, 2074, 3026, 3599, 4012, 4148, 5251, 5429, 6052, 7198, 10502, 10858, 14396, 21004, 21716, 61183, 89267, 92293, 122366, 178534, 184586, 244732, 320311, 357068, 369172, 640622, 1281244, 5445287, 10890574, 21781148]

約数ペア:

[(1, 21781148), (2, 10890574), (4, 5445287), (17, 1281244), (34, 640622), (59, 369172), (61, 357068), (68, 320311), (89, 244732), (118, 184586), (122, 178534), (178, 122366), (236, 92293), (244, 89267), (356, 61183), (1003, 21716), (1037, 21004), (1513, 14396), (2006, 10858), (2074, 10502), (3026, 7198), (3599, 6052), (4012, 5429), (4148, 5251)]